Blood Barrens enters the battlefield tapped.
: Add or to your mana pool.
Put Blood Barrens on top of your library: Add to your mana pool.
: Blood Barrens becomes a 2/1 red and black Beast creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.
to your mana pool. : Blood Barrens becomes a 2/1 red and black Beast creature until end of turn. It's still a land.
